CN106559014A - A kind of control method for brushless direct current motor based on rotary transformer - Google Patents
A kind of control method for brushless direct current motor based on rotary transformer Download PDFInfo
- Publication number
- CN106559014A CN106559014A CN201611025018.2A CN201611025018A CN106559014A CN 106559014 A CN106559014 A CN 106559014A CN 201611025018 A CN201611025018 A CN 201611025018A CN 106559014 A CN106559014 A CN 106559014A
- Authority
- CN
- China
- Prior art keywords
- motor
- phases
- brshless
- rotary transformer
- zero
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/08—Arrangements for controlling the speed or torque of a single motor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention provides the rotor coaxial of rotary transformer and brshless DC motor is installed by a kind of control method for brushless direct current motor based on rotary transformer first, brshless DC motor disengages all loads；Then enter rower zero to brshless DC motor, obtain the position measured by rotary transformer after motor mark zero；Commutation table is write, brshless DC motor is controlled according to commutation table, by the speed of rotary transformer return and position, fed back to speed and positioner forms closed loop control.The present invention had both reduced volume, improve reliability again, and high temperature resistant, environmental suitability are very good, and positional precision is high, and reliability is high, dust-proof oil-stain-preventing, life-span length, and electromagnetism interference is good, is suitable for Aero-Space servo field.
Description
Technical field
The present invention relates to a kind of control method for brushless direct current motor, it is adaptable to higher to position, speed and reliability requirement
Aerospace field servo-drive.
Background technology
Aero-Space are higher to the reliability requirement for driving servomotor, therefore using rotary transformer as position sensing
The brshless DC motor of device is to select well.Rotary transformer also can be used as velocity sensor simultaneously.
Hall element being adopted Brushless DC Motor Position sensor at present, then additional photoelectric encoder or rotation becomes more
Depressor is used as velocity sensor.If servosystem does not have backlash or backlash less certainly, the position sensing of brshless DC motor
Device can further reduce system bulk and weight as the position closed loop sensor of system.
Rotary transformer coordinates demodulation chip positional precision up to 5 arcs point, and velocity accuracy is up to 0.064rps.Although rotation
The positional precision that transformator is measured is very high, but rotary transformer does not indicate zero-bit.Therefore using the brushless of rotary transformer
After the completion of direct current generator peace turns, need into rower zero.Simultaneously because in brshless DC motor production process, rotor may be caused
The pole shoe skewness of magnet steel and stator, it is not equally distributed that this causes brshless DC motor commutation position.For nothing
Deviation occurs in brushless motor commutation reduces can efficiency, and the bigger efficiency of deviation is lower.General brshless DC motor by three suddenly
Your sensor as position sensor, when winding is not to be uniformly distributed, it will six skewness and not right occur
The commutation point of title, now cannot accurately determine six commutation points with three Hall elements, and commutation is inaccurate to cause nothing
Brushless motor efficiency is reduced.And then each commutation point can be measured using the brshless DC motor of rotary transformer strong
Just.Secondly, Chinese patent 201410424873.5 provides a kind of rotary transformer random installation brushless dc electrical-mechanical zero
Bit test method, needs host computer and oscillograph to carry out cooperation test.Method of testing and step are complicated, need to be surveyed according to oscillograph
The voltage waveform of examination judges whether position is accurate.When initial testing brshless DC motor zero position of testing, initial position ginseng
Number is to estimate, the very possible abnormal rotation of brshless DC motor.Due to arrange electric current than larger, it is possible to damage motor or
Experimental facilitiess.Chinese patent 201410827893.7 provides a kind of commutation side of the brshless DC motor based on angular transducer
Method, the patent simply determine zero-bit, and the zero-bit for determining not is the commutation point of brshless DC motor, is needed delayed or super
First 30 degree as commutation point, other commutation points according between commutation point differ 60 degree calculate.The commutation for so obtaining
Table is inaccurate, if actual commutation point is not equally distributed, its efficiency is even not as the nothing using Hall element
The efficiency high of brushless motor.
The content of the invention
In order to overcome the deficiencies in the prior art, the present invention to provide a kind of nothing for using rotary transformer as position sensor
Brushless motor scheme and its control method.A rotary transformer has only been used, volume had both been reduced, reliability has been improve again
Property.Using unshakable in one's determination and coil winding, silicon steel rotor, rotary transformer ensures that rotor is hardly damaged, -55 DEG C of running temperature to 155
DEG C, high temperature resistant, environmental suitability are very good, and positional precision is high, and reliability is high, dust-proof oil-stain-preventing, life-span length, and electromagnetism interference
Property is good, is suitable for Aero-Space servo field.
The technical solution adopted for the present invention to solve the technical problems is comprised the following steps：
(1) rotor coaxial of rotary transformer and brshless DC motor is installed, brshless DC motor disengages all loads；
(2) enter rower zero to brshless DC motor, including herein below：
(2.1) turn-on sequence of regulation brshless DC motor is AC-BC-BA-CA-CB-AB, and zero-bit is conducted for AC, inverse
Hour hands rotate to be positive direction；
(2.2) AC phases are powered, make electric current C phases be flowed by motor A phases；
(2.3) AC phases are disconnected, BC phases are powered, make electric current C phases be flowed by motor B phases；
(2.4) BC phases are disconnected, AC phases are powered, make electric current C phases be flowed by motor A phases, and record rotary transformer to be read
The position P1 for going out；
(2.5) AC phases are disconnected, AB phases are powered, make electric current B phases be flowed by motor A phases；
(2.6) AB phases are disconnected, AC phases are powered, make electric current C phases be flowed by motor A phases, and record rotary transformer to be read
The position P2 for going out；
(2.7) repeat step (2.3)～(2.6), and record position, are repeated 6 times, and obtain 12 positions are averaged i.e.
For zero-bit Pav0 for measuring；
(2.8) position of rotary transformer detection deducts Pav0 and is to position measured after motor mark zero；
(3) detection conducting phase sequence needed for replace with AC, two adjacent phases of detection phase sequence needed for BC and AB are replaced with
Sequence, repeat (2.2)～(2.7), respectively detect BC, BA, CA, CB, AB turn on when position Pav1, Pav2, Pav3, Pav4,
Pav5；
(4) position detected according to step (2) and (3), writes commutation table；
(5) brshless DC motor is controlled according to commutation table, by the speed of rotary transformer return and position, feedback
Closed loop control is formed to speed and positioner.
The invention has the beneficial effects as follows：
1) without other auxiliary equipments, brushless direct current motor controller and power supply is only needed just to complete to mark zero-sum commutation point
Detection；
2) subject range width, no matter the zero drift of the rotary transformer of brshless DC motor is much, can carry out zero-bit
Correction；
3) commutation point detecting method is simple, accurate, and each commutation point can be modified, and effectively can reduce due to processing not
The efficiency decrease problem for accurately causing；
4) direct reading speed and position, can complete position-force control in the system for do not have drive gap.
Description of the drawings
Fig. 1 is the control system of the brshless DC motor using rotary transformer；
In figure, 1-control circuit, 2-drive circuit, 3-using the brshless DC motor of rotary transformer.
Fig. 2 is brshless DC motor electrical connection diagram；
In figure, 1-control circuit, 2-drive circuit, 4-rotary transformer.
Fig. 3 is the brshless DC motor using rotary transformer；
In figure, 4-rotary transformer, the stator of 5-brshless DC motor, the rotor of 6-brshless DC motor.
Fig. 4 is brushless DC motor stator magnetomotive force schematic diagram；
In figure, rotor flux position ΦRFor the motor zero-bit of regulation, FAC、FBC、FBA、FCA、FCB、FABDifference corresponding A C,
Corresponding stator magnetomotive force direction when BC, BA, CA, CB, AB are turned on, Pav0, Pav1, Pav2, Pav3, Pav4, Pav5 are respectively
Brshless DC motor each commutation point, Pav0 is also the motor zero-bit of regulation, and w represents brshless DC motor direction of rotation.
Specific embodiment
The present invention is further described with reference to the accompanying drawings and examples, and the present invention includes but are not limited to following enforcements
Example.
The invention provides a kind of brshless DC motor scheme and its control for using rotary transformer as position sensor
Method processed.Control brshless DC motor needs the rotor-position of brshless DC motor, is commutated according to rotor-position.Using rotation
Transformation depressor has many good qualities as position sensor as brshless DC motor：Position is accurate；Commutation position is accurate so that nothing
Brushless motor it is in hgher efficiency；Rotary transformer passes through the exportable speed of demodulation chip, it is not necessary to which additionally gather way sensing
Device can just complete speed closed loop.Control method includes zero method of mark of brshless DC motor, the method for measurement commutation point and foundation
The method that the rate signal of rotary transformer output forms speed closed loop.The method can be quick, accurately detect motor zero-bit and
Commutation point, it is torque pulsation inhibited, electric efficiency is improved, reduces the volume of servosystem.
Realize technical scheme：Using the mark zero of the brshless DC motor of rotary transformer, measurement commutation point and
The method for realizing speed closed loop, the method specifically include following steps：
(1) rotor coaxial of rotary transformer and brshless DC motor is installed, motor disengages all loads.
(2) enter rower zero to brshless DC motor.
(2.1) brshless DC motor operation turn-on sequence, zero-bit and forward direction are specified：Turn-on sequence be AC-BC-BA-
CA-CB-AB, zero-bit are conducted for AC, and rotate counterclockwise is positive direction；
(2.2) AC phases are powered, make electric current C phases be flowed by motor A phases；
(2.3) AC phases are disconnected, BC phases are powered, make electric current C phases be flowed by motor B phases；
(2.4) BC phases are disconnected, AC phases are powered, make electric current C phases be flowed by motor A phases, and record rotary transformer to be read
The position P1 for going out；
(2.5) AC phases are disconnected, AB phases are powered, make electric current B phases be flowed by motor A phases；
(2.6) AB phases are disconnected, AC phases are powered, make electric current C phases be flowed by motor A phases, and record rotary transformer to be read
The position P2 for going out；
(2.7) repeat step (2.3)～(2.6), and record position, are repeated 6 times, and 12 positions are averaged as measuring
Zero-bit Pav0；
(2.8) position of rotary transformer detection deducts Pav0 and is to position measured after motor mark zero.
(3) respectively detect BC, BA, CA, CB, AB turn on when correspondence position, respectively Pav1, Pav2, Pav3, Pav4,
Pav5.AC only need to be replaced with institute with (2.2)～(2.7) by detection method of the detection method with brushless DC motor zero position, step
Conducting phase sequence need to be detected, two adjacent phase sequences of detection phase sequence needed for BC and AB are replaced with.
(4) position detected according to step (2) and (3), writes commutation table：
(5) brshless DC motor is controlled according to the commutation table in step (4), the speed that rotary transformer is returned
And position, feed back to speed and positioner forms closed loop control.
Embodiments of the invention are comprised the following steps：
(1) Fig. 3 is 3 figure of brshless DC motor using rotary transformer, and in figure, rotary transformer 4 is encapsulated in brushless direct-current
Inside motor 3, the rotor 6 of rotary transformer 4 and brshless DC motor is co-axially mounted.Detection brshless DC motor 3 zero-bit and
During commutation point, brshless DC motor 3 needs to disengage all loads.
(2) Fig. 4 be brushless DC motor stator magnetomotive force schematic diagram, wherein rotor flux position ΦRFor the motor of regulation
Zero-bit, FAC、FBC、FBA、FCA、FCB、FABCorresponding stator magnetomotive force direction when corresponding A C, BC, BA, CA, CB, AB are turned on respectively,
Pav0, Pav1, Pav2, Pav3, Pav4, Pav5 respectively each commutation point of brshless DC motor, Pav0 is also the motor of regulation
Zero-bit, w represent brshless DC motor direction of rotation.
Fig. 2 is brshless DC motor electrical connection diagram.Fig. 4 is brushless DC motor stator magnetomotive force schematic diagram, and the figure is
The position relationship of stator magnetomotive force and rotor flux during the motor zero-bit of regulation.Udc is busbar voltage, and T1-T6 is 6 switches
Pipe.Rotor flux position ΦRFor the motor zero-bit of regulation, FAC、FBC、FBA、FCA、FCB、FABRespectively corresponding A C, BC, BA, CA, CB,
Corresponding stator magnetomotive force direction when AB is turned on.FACCorresponding is the switch transistor T 1 and T6 conducting in Fig. 2, and other switching tubes break
Open, electric current flows through C by motor A phases.Now, F in corresponding stator magnetomotive force such as Fig. 4ACIt is shown, do not have loaded situation in motor
Under, stable rear rotor flux position such as ΦRIt is shown.When detection brushless DC motor zero position and commutation point, busbar voltage U, electric current：
I=U/R, wherein R are brshless DC motor line resistance.Electric current can not be very big, should in the allowed band of power supply and controller,
When rotor flux and misaligned stator magnetomotive force direction, torque energy overcomes resistance during zero load, enables rotor to go to zero
Position.As can be seen from Figure 4 when magnetomotive force during brshless DC motor produces the 6 of regulation is specified, only brshless DC motor
Rotor go to commutation point rotor and do not stress, therefore rotor to be fixed on commutation point be stable.In practical application, can use
The 10% of rated current.From figure 3, it can be seen that zero-bit is also commutation point.Detect other commutation points and detection zero-bit method and
Step is identical.Can be seen that the zero-bit of brshless DC motor is same from Fig. 4 brushless DC motor stator magnetomotive force schematic diagrams
And a commutation point, the method for illustrating zero position of testing or commutation point below as a example by testing the zero-bit of brshless DC motor：
1) make the rotor of brshless DC motor go to the zero-bit of regulation first, AC phases are powered, electric current is flowed by motor A phases
To C phases.
2) it is the cogging torque that overcomes brshless DC motor, moment of friction and rotor inertia are to surveying the shadow of zero-bit and commutation point
Ring, AC phases need to be disconnected, BC phases are powered, make electric current C phases be flowed by motor B phases.
3) BC phases are disconnected, AC phases are powered, are made electric current C phases be flowed by motor A phases, and is recorded read-out by rotary transformer
Position P1.
4) it is the cogging torque that overcomes brshless DC motor, moment of friction and rotor inertia are to surveying the shadow of zero-bit and commutation point
Ring, AC phases need to be disconnected, AB phases are powered, make electric current B phases be flowed by motor A phases.
5) AB phases are disconnected, AC phases are powered, are made electric current C phases be flowed by motor A phases, and is recorded read-out by rotary transformer
Position P2.By test twice 3) and 5), the meansigma methodss for taking P1 and P2 can reduce error.
6) repeat step (2.3)～(2.6), and record position position, are repeated 6 times, and 12 positions are averaged as surveying
Zero-bit Pav0 for obtaining.
(3) when detecting that BC, BA, CA, CB, AB are turned on respectively, corresponding position such as Fig. 4 brushless DC motor stators magnetomotive force
Shown in schematic diagram.Detection method of the detection method with 3 zero-bit of brshless DC motor, detection conducting phase needed for only need to replace with AC
Sequence, two adjacent phase sequences of detection phase sequence needed for BC and AB are replaced with.Value is respectively Pav1, Pav2, Pav3, Pav4, Pav5.
According to Fig. 4 brushless DC motor stator magnetomotive force schematic diagrams and the position detected, commutation table is write：
| Rotor-position | Rotate forward | Reversion |
| Pav0-Pav1 | BA | AB |
| Pav1-Pav2 | CA | AC |
| Pav2-Pav3 | CB | BC |
| Pav3-Pav4 | AB | BA |
| Pav4-Pav5 | AC | CA |
| Pav5-Pav0 | BC | CB |
(4) brshless DC motor is controlled according to commutation table, reads speed and the position of rotary transformer as needed
Putting carries out rotating speed and position-force control.As shown in the control system that Fig. 1 uses the brshless DC motor of rotary transformer, electric current
The when bus current that closed loop is adopted.Can be from reading speed (such as AD2S1210) in rotary transformer 4, its speed by demodulation chip
Error is less than or equal to 0.064rps, and its site error is less than or equal to 5 arcs point.In the system or drive gap that there is no drive gap
In smaller system, closed loop control can be carried out with the structure shown in Fig. 1 completely.
Claims (1)
1. a kind of control method for brushless direct current motor based on rotary transformer, it is characterised in that comprise the steps：
(1) rotor coaxial of rotary transformer and brshless DC motor is installed, brshless DC motor disengages all loads；
(2) enter rower zero to brshless DC motor, including herein below：
(2.1) turn-on sequence for specifying brshless DC motor is AC-BC-BA-CA-CB-AB, and zero-bit is conducted for AC, counterclockwise
Rotate to be positive direction；
(2.2) AC phases are powered, make electric current C phases be flowed by motor A phases；
(2.3) AC phases are disconnected, BC phases are powered, make electric current C phases be flowed by motor B phases；
(2.4) BC phases are disconnected, AC phases are powered, are made electric current C phases be flowed by motor A phases, and is recorded read-out by rotary transformer
Position P1；
(2.5) AC phases are disconnected, AB phases are powered, make electric current B phases be flowed by motor A phases；
(2.6) AB phases are disconnected, AC phases are powered, are made electric current C phases be flowed by motor A phases, and is recorded read-out by rotary transformer
Position P2；
(2.7) repeat step (2.3)～(2.6), and record position, are repeated 6 times, and obtain 12 positions are averaged as surveying
Zero-bit Pav0 for obtaining；
(2.8) position of rotary transformer detection deducts Pav0 and is to position measured after motor mark zero；
(3) detection conducting phase sequence needed for replace with AC, two adjacent phase sequences of detection phase sequence, weight needed for BC and AB are replaced with
Multiple (2.2)～(2.7), position Pav1, Pav2, Pav3, Pav4, Pav5 when detecting that BC, BA, CA, CB, AB are turned on respectively；
(4) position detected according to step (2) and (3), writes commutation table；
(5) brshless DC motor is controlled according to commutation table, by the speed of rotary transformer return and position, feeds back to speed
Degree and positioner form closed loop control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611025018.2A CN106559014B (en) | 2016-11-22 | 2016-11-22 | A kind of control method for brushless direct current motor based on rotary transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611025018.2A CN106559014B (en) | 2016-11-22 | 2016-11-22 | A kind of control method for brushless direct current motor based on rotary transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106559014A true CN106559014A (en) | 2017-04-05 |
| CN106559014B CN106559014B (en) | 2019-03-22 |
Family
ID=58444247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611025018.2A Expired - Fee Related CN106559014B (en) | 2016-11-22 | 2016-11-22 | A kind of control method for brushless direct current motor based on rotary transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106559014B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107707162A (en) * | 2017-11-24 | 2018-02-16 | 安徽维新能源技术有限公司 | A kind of brushless electric machine phase sequence automatic identification method |
| CN107707160A (en) * | 2017-10-19 | 2018-02-16 | 安徽爱意爱机电科技有限公司 | High-accuracy direct current brushless servo motor driver |
| CN107883990A (en) * | 2017-10-11 | 2018-04-06 | 广州汽车集团股份有限公司 | Over Electric Motor with PMSM rotary transformer Zero positioning method and system |
| CN107894247A (en) * | 2017-10-11 | 2018-04-10 | 广州汽车集团股份有限公司 | A kind of vehicle-mounted rotating transformer of permanent magnet synchronous motor Zero positioning method and system |
| CN108092569A (en) * | 2017-12-26 | 2018-05-29 | 陕西航天时代导航设备有限公司 | A kind of brushless motor driving method based on rotation varied angle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101656503A (en) * | 2009-09-29 | 2010-02-24 | 袁亚军 | Drive method of brushless electric bike controller |
| CN103427757A (en) * | 2013-08-21 | 2013-12-04 | 北京航空航天大学 | Magnetic bearing and motor integrated control system for magnetic suspension molecular pump |
| CN104579045A (en) * | 2014-12-26 | 2015-04-29 | 北京航天控制仪器研究所 | Angle sensor based phase change method of brushless DC (direct current) motor |
| US20160233799A1 (en) * | 2014-03-25 | 2016-08-11 | Renun Mechanical& Eletrical Co., Ltd | Efficiency improver of brushless DC motor |
-
2016
- 2016-11-22 CN CN201611025018.2A patent/CN106559014B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101656503A (en) * | 2009-09-29 | 2010-02-24 | 袁亚军 | Drive method of brushless electric bike controller |
| CN103427757A (en) * | 2013-08-21 | 2013-12-04 | 北京航空航天大学 | Magnetic bearing and motor integrated control system for magnetic suspension molecular pump |
| US20160233799A1 (en) * | 2014-03-25 | 2016-08-11 | Renun Mechanical& Eletrical Co., Ltd | Efficiency improver of brushless DC motor |
| CN104579045A (en) * | 2014-12-26 | 2015-04-29 | 北京航天控制仪器研究所 | Angle sensor based phase change method of brushless DC (direct current) motor |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107883990A (en) * | 2017-10-11 | 2018-04-06 | 广州汽车集团股份有限公司 | Over Electric Motor with PMSM rotary transformer Zero positioning method and system |
| CN107894247A (en) * | 2017-10-11 | 2018-04-10 | 广州汽车集团股份有限公司 | A kind of vehicle-mounted rotating transformer of permanent magnet synchronous motor Zero positioning method and system |
| CN107707160A (en) * | 2017-10-19 | 2018-02-16 | 安徽爱意爱机电科技有限公司 | High-accuracy direct current brushless servo motor driver |
| CN107707162A (en) * | 2017-11-24 | 2018-02-16 | 安徽维新能源技术有限公司 | A kind of brushless electric machine phase sequence automatic identification method |
| CN108092569A (en) * | 2017-12-26 | 2018-05-29 | 陕西航天时代导航设备有限公司 | A kind of brushless motor driving method based on rotation varied angle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106559014B (en) | 2019-03-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106559014A (en) | A kind of control method for brushless direct current motor based on rotary transformer | |
| JP7267398B2 (en) | Position monitoring for electrical machines | |
| US7640128B2 (en) | Rotor position detection in an electrical machine | |
| CN103166563B (en) | Permagnetic synchronous motor rotor position initial alignment detection method | |
| CN103322896B (en) | A kind of brshless DC motor Hall element installation site detection method and system | |
| KR20140001826A (en) | Method and circuit arrangement for checking the rotor position of a synchronous machine | |
| CA2076108A1 (en) | Lock detector for switched reluctance machine rotor position estimator | |
| CN107425781B (en) | A kind of position SRM predictor method based on linear flux linkage model and linear regression analysis | |
| CN104579045B (en) | A kind of phase change method of the brshless DC motor based on angular transducer | |
| KR20160045250A (en) | Offset compensation method of hall sensor in motor | |
| CN107408908B (en) | Reliable control of a multi-rotor pole switched reluctance machine | |
| US8796979B2 (en) | Apparatus for driving brushless DC motor | |
| CN103825523A (en) | System and method for detecting phase sequence and locating rotor initial angle of multiphase permanent magnet synchronous motor | |
| CN104065319B (en) | The scaling method of permanent magnet synchronous motor zero-bit initial angle | |
| CN107167735A (en) | Motor Zero positioning system and method | |
| Feuersänger et al. | Rotor position identification in synchronous machines by using the excitation machine as a sensor | |
| CN110829905B (en) | Counter potential zero-crossing detection method, device and control system for dust collector and motor | |
| CN111742483A (en) | Slotless synchronous permanent magnet motor | |
| CN105207549B (en) | Brshless DC motor driving control system | |
| CN110247606A (en) | A kind of impulses injection non position sensor switch magnetic resistance motor control method | |
| US20130207588A1 (en) | Initial driving apparatus and method of two-phase srm | |
| Joy et al. | Sensorless control of induction motor drives using additional windings on the stator | |
| CN108450052A (en) | Method and related device for controlling the synchronous machine with permanent magnet | |
| US9379650B2 (en) | Enhanced inductive sense using mutual inductance | |
| JP2012186911A (en) | Motor control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190322 Termination date: 20191122 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |